Timely medication is the key to rational drug use. According to the different types of vegetables, pests and diseases, first select the applicable pesticide varieties, and then consider the most suitable period of use.
Spade bits are used for rough boring in wood. They tend to cause splintering when they emerge from the workpiece. Woodworkers avoid splintering by finishing the hole from the opposite side of the work. Spade bits are flat, with a centering point and two cutters. The cutters are often equipped with spurs in an attempt to ensure a cleaner hole. With their small shank diameters relative to their boring diameters, spade bit shanks often have flats forged or ground into them to prevent slipping in drill chucks. Wood Spade Drill Bit,Fat Drill Bit,Paddle Drill Bit,Wood Drill Bit Behappy Crafts (suzhou)Co.,Ltd , https://www.jshaoyue.com
According to the different characteristics of the pests in different growth stages, the disease resistance of vegetable pests increased with the increase of the age of the insects. The best period of application of pesticides and pesticides should be before the 3rd instar larvae; for the pests such as cotton bollworm, carnivorous insect, sphagnum, and onion thrips, the appropriate period of application should be at the peak of egg hatching; adult stage It can be induced by sexual attractants, and the effect is obvious.
According to different climates, the control effect of many pesticides is closely related to the temperature, such as trichlorfon, dimethoate, phoxim, etc., and its control effect increases with the increase of temperature within a certain temperature range. Therefore, such pesticides are used at higher temperatures; pyrethroid insecticides such as kung fu, brommethrin, bifenthrin, cyfluthrin, etc., have better control at lower temperatures. Therefore, such pesticides should be used in the morning and evening; insecticides, fungicides, herbicides and growth regulators with systemic absorption function, when the field is weak, the temperature is low, and the relative humidity of the air begins to rise. The agent has less volatilization, and most of it can be absorbed by plants, and the control effect is better. Therefore, such agents should be used in the afternoon or evening; microbial pesticides are sensitive to light and humidity, and should be used when fogging or dew is more.
According to the characteristics of different infestation hazards of vegetable diseases, the best drug use period should be controlled before the disease is the most serious and the loss of yield is heavy. When applying a protective fungicide, the drug should be applied before the infection of the crop. Such as vegetable virus disease, prevention and treatment after the onset is more difficult, it is best to prevent medication before the onset.
According to the effect of cultivation management after administration, the best time to use in winter greenhouse production, in order to maintain the temperature of the greenhouse and reduce the humidity of the air, should be used in the morning or at noon on the sunny day, easy to release air and dehumidify after use; Avoid using it before rain to prevent rain from diluting the liquid.
Appropriate use of drugs At present, pesticides produced in China or imported from abroad are mainly based on emulsifiable concentrates; fungicides and herbicides are mainly wettable powders. Therefore, the current application method in China is mainly spray, followed by seed dressing, dusting, dusting, and poisoning. Different application methods can be selected according to different situations.
Prevent underground pests from controlling pests in the ground, such as seed dressing, poison baits, poisonous soil, root irrigation, and soil treatment.
The seed-preserving bacteria can be used to treat seeds, soak the seeds in warm soup, and the like.
The commonly used methods of administration in the production of protected areas are spraying and igniting aerosols. The smoke method is better than the spray method. The smoke method has the advantages of convenient use, uniform application, quick quick effect, timely control, high utilization rate, and no increase in air humidity.
The pesticide network reminds everyone: different pests and diseases have different characteristics, and the medication sites are different, such as vegetable downy mildew, gray mold, epidemic disease, powdery mildew, scab, black mold, blue mold and rust, etc. Should focus on the back of the spray; anthracnose, ring disease, leaf blight, leaf rot and spot disease, etc., should focus on the front of the spray when applying.
Try to enhance the control effect of pesticides, such as adding 0.30% of salt to pesticides; adding appropriate amount of copper to avermectin pesticides can enhance the penetration of pesticides and kill more of Liriomyza. Adding 0.50% white sugar to matrine increases the adhesion of the base and is more beneficial for eliminating whitefly.
Some bits are equipped with long shanks and have a small hole drilled through the flat part, allowing them to be used much like a bell-hanger bit. Intended for high speed use, they are used with electric hand drills. Spade bits are also sometimes referred to as "paddle bits".
Spade drill bits are ordinarily available in diameters from 6 to 36 mm, or ¼ to 1½ inches.